/Engine/Plugins/Slate/SlateScripting/Source/SlateScriptingCommands/Public/UICommandsScriptingSubsystem.h
Registers a new command set
Whether the set did not already exist and was successfully registered
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Editor Scripting | Commands | Sets") bool RegisterCommandSet ( [FName](API\Runtime\Core\UObject\FName) SetName )